Spark-arrester



A. McOLEARY. SPARK ARRESTBR.

Patented May 2, 1848.

UNTTED STATEE PATENT @FFTCE.

ANDW. MCCLEARY, OF PHILADELPHIA, PENNSYLVANIA.

SPARK-ARRESTER.

Specification of Letters Patent No. 5,541, dated May 2, 1848.

T 0 all whom it may concern Be it known that 1, ANDREW MOCLEARY, of thecity of Philadelphia, in the State of Pennsylvania, have invented a newand Improved Manner of Constructing Spark- Arresters for Preventing theEscape of Sparks from Locomotive and other Steam Engines; and I dohereby declare that the following is a full and exact descriptionthereof.

In the accompanying drawings Figure 1, is a vertical section of thearrester through its center; and Fig. 2, is a perspective representationof the head thereof, or that part which is above the top of the chimney,the outer case being removed for the purpose of exhibiting the interiorarrangement of this part.

A, A, is the chimney, which is of the ordinary construction, and B, B,the outer case,

or shell, which surrounds it and the cap, or head; the sparks beingintended to fall down in the space between the chimney and outer case,as in other spark arresters.

C, C, is a cylinder of wire gauze, or of perforated sheet metal to allowof the escape of the volatile products of combustion; the bottom D, D,of this cylinder is in the form of an obtuse inverted cone, which isimperforated and serves to conduct the draft, with the sparks, upward,and to bring them into contact with a double row of oblique flanches, orplates E, E. The lower ends of these oblique plates may be attached to aconical hoop, or rim F, for the purpose of holding them in place. Theflanches E, and E, cross each other, they being inclined in reversedirections, and their interior edges are turned down so as to obstructthe sparks in their tendency to approach the center; these turned downedges are shown at a, a; and more distinctly in a cross section of oneof the plates, shown in Fig. 3. The inner series of oblique fianches E,may have their inner edges within a short distance of the cylinder C, C,and the inner edges of the outer series E should be in contact with theouter edges of the fianches E, their outer edges being in contact, ornearly so, with the shell, or case B. Under this arrangement of therespective parts of the spark arrester, there will be counter currentsof the draft produced in the head, by the agency of the double series ofthe flanches E, and E, which will have the affect of greatly diminishinthe force with which the draft would otherwise carrythe sparks againstthe cylinder C, C, the consequence of which will be that they will bemade to fall by their own gravity into their in tended receptacle,consisting of the space between the chimney and the outer case B, B,while the smoke and heated air will escape through the meshes of thewire gauze, or the perforations in the metallic plate constituting thecylinder C C and pass off freely at its upper end which is open.

Having thus fully described the manner in which I form and arrange therespective parts of my spark arrester, and shown the operation thereof,what I claim therein as new and desire to secure by Letters Patent, 1s-

The manner of arranging of the double series of oblique plates orflanches E and E which are made to cross each other between theperforated cylinder C and the external case B within the head or cap inthe manner and for the purpose herein before described and made known.

ANDREW MOCLEARY. WVitnesses O. A. NORRIS, M. O. Dmrz.

